rear end vent hose routing?
5th Gear Member
Joined: Apr 2007
Posts: 4,881
From: Camas, Washington
RE: rear end vent hose routing?
ORIGINAL: 67mustang302
That hose plugs into nothing. When you drive the rear end gets hot from all the moving parts, if the axle housing gets hit with a lot of water, or you go through a puddle and it gets submerged, the water cools the axle housing rapidly, which causes the air inside the housing to cool and contract, generating a small vacuum. The vent is so air can move in/out as the axle housing heats/cools. As long as you have the tube attached and the end of the tube open to the atmosphere at a point above where it can get water in it, you're fine. What can happen is if the axle housing gets submerged, when it cools and generates a vacuum, if the vent is underwater, it will suck some water into the housing and can lead to emulsified gear oil(water in the oil=bad). It's primarilly a problem with offroad vehicles, and not so much with street vehicles. But just mount it so that water won't get up into it
That hose plugs into nothing. When you drive the rear end gets hot from all the moving parts, if the axle housing gets hit with a lot of water, or you go through a puddle and it gets submerged, the water cools the axle housing rapidly, which causes the air inside the housing to cool and contract, generating a small vacuum. The vent is so air can move in/out as the axle housing heats/cools. As long as you have the tube attached and the end of the tube open to the atmosphere at a point above where it can get water in it, you're fine. What can happen is if the axle housing gets submerged, when it cools and generates a vacuum, if the vent is underwater, it will suck some water into the housing and can lead to emulsified gear oil(water in the oil=bad). It's primarilly a problem with offroad vehicles, and not so much with street vehicles. But just mount it so that water won't get up into it
6th Gear Member
Joined: Apr 2007
Posts: 10,468
From: California
RE: rear end vent hose routing?
The idea is to NOT get water in the rear end. Any rear end heats and cools as it works, that causes pressure changes, so an axle housing has to have a vent otherwise the pressure would relieve itself through the axle seals and you get leaks, or suck water through the seals if they got submerged in a puddle. The vent is nothing more than a fitting on the axle housing with a tube, but the tube must have it's opening somewhere up high so water won't get in. That way the pressure changes relieve pressure through the tube, and not your seals
6th Gear Member
Joined: Apr 2007
Posts: 10,468
From: California
RE: rear end vent hose routing?
I wonder how many 4x4 guys go without proper axle venting and attribute failed ring/pinion gears to their "powerful offroad vehicle" rather than their own ignorance
5th Gear Member
Joined: Apr 2007
Posts: 4,881
From: Camas, Washington
RE: rear end vent hose routing?
ORIGINAL: 66GTKFB
Use distilled water, it's 'cleaner'. And use oatmeal instead of bleach.
Jim
Use distilled water, it's 'cleaner'. And use oatmeal instead of bleach.
Jim